#pragma once

#include "Registers.hpp"
#include <cstdint>


class NES;


const unsigned int VRAM_SIZE = 2048u;
const unsigned int VIDEO_WIDTH = 256u;
const unsigned int VIDEO_HEIGHT = 240u;


class PPU
{
public:
	void Cycle(uint8_t cpuCyclesElapsed);
	void WriteRegister(PpuRegister reg, uint8_t value);
	uint8_t ReadRegister(PpuRegister reg);

	void WriteMemory(uint16_t address, uint8_t value);
	uint8_t ReadMemory(uint16_t address);

private:
	friend class NES;

	PpuRegisterCTRL ppuCtrl{};
	PpuRegisterMask ppuMask{};
	PpuRegisterStatus ppuStatus{};
	uint8_t oamAddr{};
	uint8_t oamData{};
	uint8_t oam[256]{};
	uint8_t ppuScroll{};
	uint16_t ppuAddr{};
	uint8_t ppuData{};

	bool ppuAddrW{};

	uint8_t regV{};
	uint8_t regT{};
	uint8_t regX{};
	uint8_t regW{};

	uint16_t cycles{};
	uint16_t scanline{};

	uint8_t ram[VRAM_SIZE]{};
	uint8_t paletteIndexes[32]{};

	uint32_t video[VIDEO_WIDTH * VIDEO_HEIGHT]{};

	NES* nes;
};